Atrial fibrillation (AF)

Definition:

Atrial fibrillation (AF) is the most common arrhythmia encountered in the ICU. Preexisting AF is highly prevalent among older patients with chronic conditions who are at risk for critical illness, whereas new-onset AF can be triggered by accelerated atrial remodeling and arrhythmogenic triggers encountered during critical illness. The acute loss of atrial systole and onset of rapid ventricular rates that characterize new-onset AF often lead to decreased cardiac output and hemodynamic compromise.

References:

[1]. Bosch NA, et al. Atrial Fibrillation in the ICU. Chest. 2018 Dec;154(6):1424-1434. [Content Brief]

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